Feeding chain for woodworking machines



Y May 9, 1933. G BENDlX l 1,907,479

-FEEDING CHAIN FOR WOODWORKING MACHINES Filed April 19, 1932 INVENTOR jf/@ ffm Patented May 9, 1933 UNITED STATES GEORGE BENDIX, OF KOENIGSBERG, GERMANY nEEnrNG CHAIN non Woon-Wonirme MACHINES Application filed April 19, 1932, Serial No. V606,132, and in Germany July 1, 193%).

My invention relates to feeding chains for wood working machines and specially to the improved construction of feeding bolts lying in the chain links.

The object of my invention is to create stop portions which protrude beyond the surface of the chain in case they are not pressed down by stocks, so that they can be used to grasp behind the stock which requires to be pushed forward or adjust the front corner of the stock newly fitted.

Thereare further advantages which will be clearly understood after comprehending the nature of the invention.

With reference to these and other objects the invention consists in certain newly constructed details, combinations and adjustments as described hereinafter and pointed out in the appended claim.

As the drawing only shows one embodiment of the invention, it is evident that in adj ustment of other relations and requirements numerous alterations referring to shape, proportion and small specialties of construction can be executed without departing` from the spirit of the invention.

In the drawing:

Fig. 1 is a partial elevational view of the feeding mechanism. Fig. 2 is a transverse section seen from line 2 2 of Figure 1. Fig.

3 is a plan view of that part of the mechanism shown in Figure 1. Fig. 4 is a longitudinal section of a portion of the feedin chain. Fig. 5 is a plan view of this portion of the feeding chain. Fig. 6 is a transverse section seen from line 6 6 of Figure 4. Fig.

7 is a view of one on the feeding bolts.

Corresponding parts are denoted in the following description and in the different 420 views of the drawing by the same numbers.

With reference to the drawing, 1 denotes the single links of the endless feeding chain, which in their ends grip each other and have axle borings held together by bolts 2 which l5 are conducted through the axle borings.

Each chain link 1 has a guiding hole 3 vertical to the surface of the chain. In this hole 3 is a cylindrical feeding bolt 4 thus, that this bolt can be moved axially. The bolt 59 4 has a slit 5 in which rests the free end of a spiral spring -6 protruding beyond bolt 4 whilst theother yend is turned round the next bolt 2.. -f The spring 6 is bent thus, that it has the tendency to push the bolt 4 towards the surface of the chain link until the vfree end oi the spring 6 touches the chain link Vand thus limits the utmost position of bolt 4. VBut if bolt 4 is in reverse position, for example in that portion of the chain which hangs down and is not in use, as shown in Figure 1, a pin 7 Vwhich goes through the bolt 4 comes in application. This pin 7 is placed thus, that it prevents bolt 4 from dropping out of the spring 6 as well as out of the guiding hole 3.

Feeding bolt 4 has at its enda stop portion 8 formed by iiattening of feeding bolt 4, which iattenings are placed in the moving and reverse direction of the cha-in. The stop portion 8 is intended to push against stock 9 and either to push forward the stock or to be a stop for the stock which is pushed from behind. In the latter case the stock is pushed by the workman until caught from behind by feeding bolts. Those of the feeding bolts 4 which are not in use for the time being are pressed by the weights of the stock by overcoming the small resistance -of spring 6 below the surface of chain links 1 as shown in Figure 4 on the left feeding bolt.

In the example of construction shown the chain is placed on the chain bed 10 as it can be provided on both sides of the feeding g mechanism of the wood working machine.

This chain bed 10 has on its surface prismatical guiding slides, on which the chain links slide by their correspondingly formed guiding grooves 11. The movement of the chain is caused by the chain wheel 12 formed in Octagon shape thus, that the length of each side corresponds to the distance between any two joining bolts 2 of the chain. Moreover the chain is guided by the guiding wheels 13, 14, 15, whichare also angular and of which 15 is movable by means of axially pushableV arm 16 in using a screwing arrangement 17 in order to stretch the chain.

I wish it to be usderstood that I do not desire to be limited to the exact details of construction shown and described, for ob- Ale Vious modifications Will occur to a person skilled is the art.

What I claim is:

In a feeding chain of the kind described, chain links with guiding holes running vertically to the surface of the chain links, feeding bolts axially slidable in the said guiding holes, having a stop portion normally protruding beyond the surface of the chain link and intended to push the stock lying on the chain, springs attached to the joining bolts of the chain links and holding the stop portions of the feeding bolts pushed outward if the latter are not axially pressed down by a stock lying on the surface of the chain links and vcovering the mouths of the guiding holes for the feeding bolts, meansy adapted `to limit the ladvance of the feeding bolts and to prevent the dropping out of the latter when chain links are in inverted position.

In testimony whereof I ax my signature.

GEORGE BENDIX. 

